问题描述：
There is () umbrella behind the door.It isn't Sandy's.It's ().A a;hers B an;his C a;
There is () umbrella behind the door.It isn't Sandy's.It's ().A a;hers B an;his C a;his D an;her
There is () umbrella behind the door.It isn't Sandy's.It's ().A a;hers B an;his C a;his D an;her
问题解答：
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